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Prenolepis Imparis
''Prenolepis imparis'', commonly known as the winter ant, false honey ant, or false honeypot ant, is a species of ant in the genus ''Prenolepis''. The species is found in North America, from Canada to Mexico, nesting deep within the ground. Unusual among ants, ''Prenolepis imparis'' prefers lower temperatures, including near freezing, and is only active outside the nest during winter and early spring. ''Prenolepis imparis'' enters a hibernation-like state called aestivation during the summer. ''P. imparis'' secretes an opaque white liquid from its abdomen as a defense against other ants, including ''Linepithema humile''. The defensive secretions appear to be derived anatomically from the Dufour's gland and has been shown to contain a mixture of alkanes and alkenes including hexadecene, octadecene, tetradecene, octylcyclohexane, and hexadecane Hexadecane (also called cetane) is an alkane hydrocarbon with the chemical formula C16H34. Hexadecane consists of a chain of 16 carbon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Say
Thomas Say (June 27, 1787 – October 10, 1834) was an American entomologist, conchologist, and Herpetology, herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georgia, the Rocky Mountains, Mexico, and elsewhere made him an internationally known naturalist. Say has been called the father of American descriptive entomology and American conchology. He served as librarian for the Academy of Natural Sciences of Philadelphia, curator at the American Philosophical Society (elected in 1817), and professor of natural history at the University of Pennsylvania. Early life and education Born in Philadelphia into a prominent Religious Society of Friends, Quaker family, Thomas Say was the great-grandson of John Bartram, and the great-nephew of William Bartram. His father, Dr. Benjamin Say, was brother-in-law to another Bartram son, Moses Bartram. The Say family had a house, "The Cliffs" at Gray's Ferry Bridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prenolepis Imparis, Male
''Prenolepis'' is a genus of ants in the subfamily Formicinae. Most species are found in southeastern Asia and southern China, but the genus has a wide distribution with species known from North America, southern Europe, Anatolia, Cuba, Haiti, and West Africa. Species *''Prenolepis angularis'' Zhou, 2001 *''Prenolepis cyclopia'' Chen & Zhou, 2018 *''Prenolepis darlena'' Williams & LaPolla, 2016 *''Prenolepis dugasi'' Forel, 1911 *''Prenolepis fisheri'' Bharti & Wachkoo, 2012 *''Prenolepis fustinoda'' Williams & LaPolla, 2016 *†''Prenolepis henschei'' Mayr, 1868 *''Prenolepis imparis'' (Say, 1836) *''Prenolepis jacobsoni'' Crawley, 1923 *''Prenolepis jerdoni'' Emery, 1893 *''Prenolepis lakekamu'' Williams & LaPolla, 2018 *''Prenolepis mediops'' Williams & LaPolla, 2016 *''Prenolepis melanogaster'' Emery, 1893 *''Prenolepis naoroji'' Forel, 1902 *''Prenolepis nepalensis'' Williams & LaPolla, 2018 *''Prenolepis nitens'' (Mayr, 1853) *''Prenolepis quinquedenta'' Chen & Zhou, 2018 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prenolepis
''Prenolepis'' is a genus of ants in the subfamily Formicinae. Most species are found in southeastern Asia and southern China, but the genus has a wide distribution with species known from North America, southern Europe, Anatolia, Cuba, Haiti, and West Africa. Species *''Prenolepis angularis'' Zhou, 2001 *'' Prenolepis cyclopia'' Chen & Zhou, 2018 *''Prenolepis darlena'' Williams & LaPolla, 2016 *''Prenolepis dugasi'' Forel, 1911 *''Prenolepis fisheri'' Bharti & Wachkoo, 2012 *''Prenolepis fustinoda'' Williams & LaPolla, 2016 *†''Prenolepis henschei'' Mayr, 1868 *''Prenolepis imparis'' (Say, 1836) *''Prenolepis jacobsoni'' Crawley, 1923 *''Prenolepis jerdoni'' Emery, 1893 *''Prenolepis lakekamu'' Williams & LaPolla, 2018 *'' Prenolepis mediops'' Williams & LaPolla, 2016 *'' Prenolepis melanogaster'' Emery, 1893 *'' Prenolepis naoroji'' Forel, 1902 *''Prenolepis nepalensis'' Williams & LaPolla, 2018 *''Prenolepis nitens ''Prenolepis'' is a genus of ants in the subfamily F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by total area. Its southern and western border with the United States, stretching , is the world's longest binational land border. Canada's capital is Ottawa, and its three largest metropolitan areas are Toronto, Montreal, and Vancouver. Indigenous peoples have continuously inhabited what is now Canada for thousands of years. Beginning in the 16th century, British and French expeditions explored and later settled along the Atlantic coast. As a consequence of various armed conflicts, France ceded nearly all of its colonies in North America in 1763. In 1867, with the union of three British North American colonies through Confederation, Canada was formed as a federal dominion of four provinces. This began an accretion of provinces an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Mexico covers ,Mexico ''''. . making it the world's 13th-largest country by are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aestivation
Aestivation ( la, aestas (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter. Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. It takes place during times of heat and dryness, the hot dry season, which are often the summer months. Invertebrate and vertebrate animals are known to enter this state to avoid damage from high temperatures and the risk of desiccation. Both terrestrial and aquatic animals undergo aestivation. Fossil records suggest that aestivation may have evolved several hundred million years ago. Physiology Organisms that aestivate appear to be in a fairly "light" state of dormancy, as their physiological state can be rapidly reversed, and the organism can quickly return to a normal state. A study done on '' Otala lactea'', a snail native to parts of Eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linepithema Humile
The Argentine ant (''Linepithema humile''), formerly ''Iridomyrmex humilis'', is an ant native to northern Argentina, Uruguay, Paraguay, Bolivia and southern Brazil. It is an invasive species that has been established in many Mediterranean climate areas, inadvertently introduced by humans to many places, including South Africa, New Zealand, Japan, Easter Island, Australia, Europe, Hawaii, and the continental United States. Description The worker ants are long and can easily squeeze through cracks and holes as small as in size. Queens are long, much smaller than other species of ants. These ants will set up quarters in the ground, in cracks in concrete walls, in spaces between boards and timbers, even among belongings in human dwellings. In natural areas, they generally nest shallowly in loose leaf litter or beneath small stones, due to their poor ability to dig deeper nests. However, if a deeper nesting ant species abandons their nest, Argentine ant colonies will readily take ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dufour's Gland
Dufour's gland is an abdominal gland of certain insects, part of the anatomy of the ovipositor or sting apparatus in female members of Apocrita. The diversification of Hymenoptera took place in the Cretaceous and the gland may have developed at about this time (200 million years ago) as it is present in all three groups of Apocrita, the wasps, bees and ants. Structure Dufour’s gland was first described by Léon Jean Marie Dufour in 1841. Along with the spermatheca and the poison gland, it develops as an invagination of valves of the sternum. It empties at the base of the ovipositor in ants but into the dorsal vaginal wall in bees and wasps. The gland is lined by a single layer of epithelial cells which secrete substances into the hollow interior. Muscles round the opening of the duct may help control the outflow. Function The purpose of Dufour’s gland is to secrete chemicals, but the nature of the secretions and their function differs in various hymenopteran groups. The sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexadecene
1-Hexadecene, also known as 1-cetene, is a long-chain hydrocarbon and an alkene with the molecular formula CH2=CH(CH2)13CH3. It is one of many isomers of hexadecene. Classified as an alpha-olefin, 1-hexadecene is a colorless liquid. 1-Hexadecene is used as a surfactant in lubricating fluid, a drilling fluid in the boring and drilling industry, and in paper sizing. However, the high reactivity of 1-hexadecene means that exposure to air could cause oxidation of its surface layer, forming unwanted impurities. It is stored with the use of tank blanketing Tank blanketing, also referred to as tank padding, is the process of applying a gas to the empty space in a storage tank, storage container. The term storage container here refers to any container that is used to store products, regardless of its s ..., and handled in a dry, inert atmosphere. References {{Reflist Hexadecene1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octadecane
Octadecane is an alkane hydrocarbon with the chemical formula CH3(CH2)16CH3. Properties Octadecane is distinguished by being the alkane with the lowest carbon number In organic chemistry, the carbon number of a compound is the number of carbon atoms in each molecule.Nava Dayan, Lambros Kromidas (ed.) ''Formulating, Packaging, and Marketing of Natural Cosmetic Products'' John Wiley & Sons, 2011; ; page 218 Th ... that is unambiguously solid at room temperature and pressure. References External links Phytochemical and Ethnobotanical Databases Alkanes {{hydrocarbon-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetradecane
Tetradecane is an alkane hydrocarbon with the chemical formula CH3(CH2)12CH3. Tetradecane has 1858 structural isomers. See also * Higher alkanes Higher alkanes are alkanes having nine or more carbon atoms. Nonane is the lightest alkane to have a flash point above 25 °C, and is not classified as dangerously flammable. The term ''higher alkanes'' is sometimes used literally as "alkanes ... * List of isomers of tetradecane References External links Material Safety Data Sheet for Tetradecane * http://www.ars-grin.gov/cgi-bin/duke/chemical.pl?TETRADECANE Alkanes {{hydrocarbon-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexadecane
Hexadecane (also called cetane) is an alkane hydrocarbon with the chemical formula C16H34. Hexadecane consists of a chain of 16 carbon atoms, with three hydrogen atoms bonded to the two end carbon atoms, and two hydrogens bonded to each of the 14 other carbon atoms. Cetane number ''Cetane'' is often used as a shorthand for cetane number, a measure of the combustion of diesel fuel. Cetane ignites very easily under compression; for this reason, it is assigned a cetane number of 100, and serves as a reference for other fuel mixtures. Hexadecyl radical Hexadecyl is an alkyl radical of carbon and hydrogen derived from hexadecane, with formula C16H33 and with mass 225.433, occurring especially in cetyl alcohol. It confers strong hydrophobicity on molecules containing it. Carboplatin modified with hexadecyl and polyethylene glycol has increased liposolubility and PEGylation, proposed to useful in chemotherapy, specifically non-small-cell lung cancer. Hexadecyl was used from 1982 for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
